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Two-dimensional radial imaging method for mirror image synthetic aperture

A technology of radiation imaging and synthetic aperture, applied in the direction of re-radiation, radio wave reflection/re-radiation, instruments, etc., can solve problems such as huge data volume, limited system performance, complex system structure and signal processing, and reduce complexity The effect of reducing the complexity of signal processing

Active Publication Date: 2011-02-16
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, this advantage is at the cost of system structure and signal processing complexity, especially for large-scale synthetic aperture systems such as spaceborne synthetic aperture radiometers. Due to the large number of array elements, the system structure and signal processing will be very complicated. The amount of data is also an important issue that cannot be ignored
These factors limit the further improvement of system performance

Method used

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  • Two-dimensional radial imaging method for mirror image synthetic aperture
  • Two-dimensional radial imaging method for mirror image synthetic aperture
  • Two-dimensional radial imaging method for mirror image synthetic aperture

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0021] The present invention utilizes the relationship among correlation output, cosine visibility, and scene brightness temperature (brightness temperature) distribution, solves the cosine visibility by solving linear equations, and then reconstructs the scene brightness temperature distribution through inverse cosine transformation.

[0022] Principle of the present invention is as follows:

[0023] Set up two reflective surfaces perpendicular to the scene under test, so that the radiation signal of the scene under test is received by the antenna array through four paths, of which the first path is that the radiation signal is directly received by the antenna array, and the second path is that the radiation signal passes through the first The reflective surface is reflected and received by the antenna array, the third path is that the radiat...

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Abstract

The invention belongs to the technical field of microwave remote sensing and probing, and discloses a two-dimensional radial imaging method. An imaging system consists of an antenna array and two reflecting surfaces. By measuring related output of all antennas, the cosine visibility is solved by solving linear equations associated with the related output and the cosine visibility, and then brightness and temperature distribution of a scene is reestablished by inverse cosine transform. By the imaging method, high system resolution can be obtained by using a small number of antennas and a simple receiver structure.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing and detection, in particular to a two-dimensional microwave radiation imaging method. Background technique [0002] The synthetic aperture radiometer uses multiple discrete small antennas to synthesize a larger real aperture, which is arranged in a sparse array, which greatly reduces the mass and volume of the antenna, and solves the inherent contradiction between resolution and aperture size. However, this advantage is at the cost of system structure and signal processing complexity, especially for large-scale synthetic aperture systems such as spaceborne synthetic aperture radiometers. Due to the large number of array elements, the system structure and signal processing will be very complicated. The amount of data is also an important issue that cannot be ignored. These factors limit the further improvement of system performance. Contents of the invention [0003] The purpos...

Claims

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Application Information

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IPC IPC(8): G01S13/90
Inventor 李青侠陈柯陈良兵郭伟胡飞
Owner HUAZHONG UNIV OF SCI & TECH
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